HP LTO Ultrium cartridges meet all your demands for maximum reliability
when restoring data, offering high storage density, ease of management
and scalable storage and backup performance. Covering six generations of
capacity - and with transfer speeds of up to 1.4 TB/hr for LTO-6, there
is a platform for every need and budget.

You will need an LTO 6 drive to read your LTO 6 media. However, the
drives are "backwards compatible". When you upgrade to an LTO 6 drive,
it will still be able to read and write your LTO 5 cartridges, and read your LTO 4 tapes.